US4398531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Percussor
Assignee: CREDITANSTALT-BANKVEREIN
•
Filing: 1981-01-08
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Granted: 1983-08-16
•
Expires: 2001-01-08
Abstract
Abstract An improved percussor assembly having a reciprocating percussion member for directing reciprocating motion to a user including a valve responsive to movement of the percussion member for temporarily and alternately interrupting the flow of gas in the percussor in response to the alternate movement of the reciprocating percussion member.
Inventors
- 👤 Harold R. Havstad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:47
CPC Classifications
A; A61; A61H; A61H23/00; A61H23/04
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
121 words
A percussor comprising: a reciprocating assembly comprising a reciprocating plate and an applicator cooperating therewith for directing reciprocating motion from said plate to a user, a gas outlet passageway, a gas pressure chamber and releasable gas sealing means for forming a gas-tight seal therebetween, a gas inlet passageway communicating with said gas pressure chamber for introducing gas thereto at a pressure sufficient to release said gas-tight seal causing movement of said reciprocating assembly, valve means for temporarily interrupting the flow of gas from said gas inlet passageway to said gas pressure chamber when said reciprocating assembly is moved, and a valve actuation means rigidly secured to said reciprocating assembly and simultaneously reciprocating therewith for alternately opening and closing said valve means.
Claim 2
Dependent Claim
121 words
A percussor comprising: a reciprocating assembly comprising a reciprocating plate and an applicator cooperating therewith for directing reciprocating motion from said plate to a user, a gas outlet passageway, a gas pressure chamber and releasable gas sealing means for forming a gas-tight seal therebetween, a gas inlet passageway communicating with said gas pressure chamber for introducing gas thereto at a pressure sufficient to release said gas-tight seal causing movement of said reciprocating assembly, valve means for temporarily interrupting the flow of gas from said gas inlet passageway to said gas pressure chamber when said reciprocating assembly is moved, and a valve actuation means rigidly secured to said reciprocating assembly and simultaneously reciprocating therewith for alternately opening and closing said valve means.
Claim 3
Dependent Claim
25 words
The assembly of claim 1 wherein said valve means alternately opens and closes said communication between said gas inlet passageway and said gas pressure chamber.
Claim 4
Dependent Claim
90 words
The assembly of claim 2 wherein said reciprocating assembly is biased and urged to a first position and said gas sealing means forms said gas-tight seal, said reciprocating assembly moving to a second position when said gas-tight seal is released, and wherein said valve actuation means includes a valve actuation member for closing said valve means as said reciprocating assembly is moved from said first position to said second position, and for opening said valve means as said reciprocating assembly is moved from said second position to said first position.
Claim 5
Dependent Claim
35 words
The assembly of claim 3 wherein said valve means includes a ball and biasing means cooperating therewith for urging said ball to close said communication between said gas inlet passageway and said gas pressure chamber.
References Cited (Backward Citations)
FR488311A
Cited
US1780876A
Cited
GB344986A
Cited
US2646039A
Cited
US3396721A
Cited
US3613724A
Cited
US4050357A
Cited
GB1553678A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-08-15 | 1987-02-14 | 1987-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-15 | 1991-02-14 | 1991-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-15 | 1995-02-14 | 1995-08-16 | $7700.00 | Window Closed / Lapsed |